Solderless connector must be screwed down to heatsink, it cannot be glued. You have to drill and tap heatsink yourself or save time and use our predrilled and tapped heatsinks. This is without a doubt the least complicated solderless build. Unlike those glue down stars with built in terminals and jumpers you can easily swap out a LED to tweak the colour and looks. BJB_brochure_LED_StarBoard_47_313-2010-04_english